6779261749 has 8 divisors (see below), whose sum is σ = 7349743800. Its totient is φ = 6215779776.

The previous prime is 6779261711. The next prime is 6779261789. The reversal of 6779261749 is 9471629776.

It can be written as a sum of positive squares in 4 ways, for example, as 125596849 + 6653664900 = 11207^2 + 81570^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6779261749 - 2¹⁹ = 6778737461 is a prime.

It is a super-2 number, since 2×6779261749² = 91916779722909078002, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6779261693 and 6779261702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6779261789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1748002 + ... + 1751875.

It is an arithmetic number, because the mean of its divisors is an integer number (918717975).

Almost surely, 2^6779261749 is an apocalyptic number.

It is an amenable number.

6779261749 is a deficient number, since it is larger than the sum of its proper divisors (570482051).

6779261749 is a wasteful number, since it uses less digits than its factorization.

6779261749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3500039.

The product of its digits is 8001504, while the sum is 58.

The square root of 6779261749 is about 82336.2723773672. The cubic root of 6779261749 is about 1892.6085635105.

The spelling of 6779261749 in words is "six billion, seven hundred seventy-nine million, two hundred sixty-one thousand, seven hundred forty-nine".